ASSIGNMENTS view

The INFORMATION_SCHEMA.ASSIGNMENTS view contains a near real-time list of all current assignments within the administration project. Each row represents a single, current assignment. A current assignment is either pending or active and has not been deleted. For more information about reservation, see Introduction to Reservations.

Required permission

To query the INFORMATION_SCHEMA.ASSIGNMENTS view, you need the bigquery.reservationAssignments.list Identity and Access Management (IAM) permission for the project. Each of the following predefined IAM roles includes the required permission:

roles/bigquery.resourceAdmin
roles/bigquery.resourceEditor
roles/bigquery.resourceViewer
roles/bigquery.user
roles/bigquery.admin

For more information about BigQuery permissions, see Access control with IAM.

Schema

The INFORMATION_SCHEMA.ASSIGNMENTS view has the following schema:

Column name	Data type	Value
`ddl`	`STRING`	The DDL statement used to create this assignment.
`project_id`	`STRING`	ID of the administration project.
`project_number`	`INTEGER`	Number of the administration project.
`assignment_id`	`STRING`	ID that uniquely identifies the assignment.
`reservation_name`	`STRING`	Name of the reservation that the assignment uses.
`job_type`	`STRING`	The type of job that can use the reservation. Can be `PIPELINE`, `QUERY`, `CONTINUOUS`, `ML_EXTERNAL`, or `BACKGROUND`.
`assignee_id`	`STRING`	ID that uniquely identifies the assignee resource.
`assignee_number`	`INTEGER`	Number that uniquely identifies the assignee resource.
`assignee_type`	`STRING`	Type of assignee resource. Can be `organization`, `folder` or `project`.

Scope and syntax

Queries against this view must include a region qualifier. If you do not specify a regional qualifier, metadata is retrieved from all regions. The following table explains the region scope for this view:

View name	Resource scope	Region scope
[PROJECT_ID.]`region-REGION`.INFORMATION_SCHEMA.ASSIGNMENTS[_BY_PROJECT]	Project level	`REGION`

Replace the following:

Optional: PROJECT_ID: the ID of your Google Cloud project. If not specified, the default project is used.

REGION: any dataset region name. For example, `region-us`.

Note: You must use a region qualifier to query INFORMATION_SCHEMA views. The location of the query execution must match the region of the INFORMATION_SCHEMA view.

Example

To run the query against a project other than your default project, add the project ID in the following format:

`PROJECT_ID`.`region-REGION_NAME`.INFORMATION_SCHEMA.ASSIGNMENTS

Replace the following:

PROJECT_ID: the ID of the project to which you have assigned reservations.
REGION_NAME: the name of the region.

For example, `myproject`.`region-us`.INFORMATION_SCHEMA.ASSIGNMENTS.

The following example gets a project's currently assigned reservation and its slot capacity. This information is useful for debugging job performance by comparing the project's slot usage with the slot capacity of the reservation assigned to that project.

SELECT
  reservation.reservation_name,
  reservation.slot_capacity
FROM
  `RESERVATION_ADMIN_PROJECT.region-REGION_NAME`.
  INFORMATION_SCHEMA.ASSIGNMENTS_BY_PROJECT assignment
INNER JOIN
  `RESERVATION_ADMIN_PROJECT.region-REGION_NAME`.
  INFORMATION_SCHEMA.RESERVATIONS_BY_PROJECT AS reservation
ON
  (assignment.reservation_name = reservation.reservation_name)
WHERE
   assignment.assignee_id = "PROJECT_ID"
  AND job_type = "QUERY";